Granted Patent
Utility
US 6,144,726 · App. 09/096,786
Telecommunications access cost management system
Inventor:
Christopher Cross
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Jun 12, 1998
Inventor
Christopher Cross
Assignee (at issue)
CSG Systems, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.